‘Animal House’ star Tim Matheson slept with three women in one day — including Kirstie Alley

In his new memoir, "Animal House" star Tim Matheson (left) writes about a very special birthday -- when he slept with three different women. ©Universal/Courtesy Everett Collection

“Animal House” star Tim Matheson shares some raunchy tales in his new memoir, “Damn Glad to Meet You” — including separate romps with Kirstie Alley and two other women on the same day.

The actor, 76, writes that the day before his 33rd birthday, he was in Los Angeles while his then-girlfriend was working in New York.

The day began when a female friend, wearing a “sherry lace top and crotchless velvet panties,” knocked on his door, wanting to give Matheson “an early present.”

Matheson writes about his sexy exploits and more in “Damn Glad To Meet You.” Getty Images

Matheson insists in the book that he “really did love this other girl three-thousand-plus miles away … ” but writes that it “doesn’t mean I wasn’t a pig and an idiot.”

Later that day, “The West Wing” alum received another knock at his door from a “beautiful waitress I knew who worked a couple of blocks down the street.”

One of the women Matheson had sex with that day was Kirstie Alley, he writes. ©NBC/Courtesy Everett Collection Alley, who passed away in 2022, was almost busted in bed with Matheson by his girlfriend. BuzzFoto/FilmMagic

She also wanted to wish Matheson a sexy happy birthday — and he happily accepted the offer.

Hours later, the “Virgin River” star was relaxing from his busy endeavors when actress Kirstie Alley called.

“Kirstie hadn’t hit yet and was still two years from ‘Star Trek II: The Wrath of Khan’ and five years from ‘Cheers’ and a superstar career,” he writes of the actress, who passed away in 2022 at age 71. “She was also a few years from Scientology and, so, still in her fun Wichita-gal-now-in-LA partying phase.”

Matheson (left) is probably best known for his role in “Animal House,” with John Belushi. ©Universal/Courtesy Everett Collection He played Eric “Otter” Stratton in “Animal House.” ©Universal/courtesy Everett / Everett Collection

Alley asked to come over and, Matheson writes that, soon after, “Kirstie Alley is naked and we’re enjoying some postcoital conversation in my bed.”

However, while they were chatting, the actor heard something downstairs. It was his girlfriend, who had flown in to surprise him for his birthday.

Matheson co-stars as Doc on the Netflix series “Virgin River” (with Alexandra Breckenridge). COURTESY OF NETFLIX He also played John Hoynes on “The West Wing” (with Allison Janney). NBCUniversal via Getty Images

Somehow, Matheson managed to steer his girlfriend away, buying enough time for Alley to “magically” slink away.

Matheson also writes of dating the English supermodel Twiggy, who was eager to settle down, and seeing a “gorgeous woman named Georganne,” who lived with her sister.

“Damn Glad to Meet You,” by Tim Matheson, is out now.

“We walked in where big sis was lying in her bed reading,” he writes. “Her sister was Cher. The Cher … Georganne had not bothered to reveal the identity of her sister to me … It [was] startling to say the least.”

Matheson — who went on to memorable roles in “Fletch” and Hart of Dixie” — also writes about his hits and misses in Hollywood, revealing he turned down “MacGyver” and the father character in “7th Heaven.”